From Manufacture :
Our new revolutionary One Part Tough as Tile Epoxy Paint provides a hard, protective finish that remains beautiful for years. Our One Part Epoxy Paint means no mixing, no mess, and a longer shelf life. Refinishing or re-coloring your tub or sink eliminates the time, hassle and expense of a complete bathroom remodel. Our self-leveling finish leaves a smooth high-gloss porcelain-like surface breathing new life into your old worn out tub or sink.

From Gleem:
This 26oz can is enough to cover 45 square feet, which is good for two coats on a standard size tub. Only comes in white, however can be tinted to any pastel color using (up to 1oz per quart) of universal tint colorants.